zippy!

iTrader: (1)

hi fellas stripped my bottom end down ready to rebuild as sounded like it was knocking quite badly only to find that the crank and bearings are fine but piston #2 has melted slightly down one side and all the rings were broken anyone any ideas as to what could of caused this as dont want to rebuild it only for it to happen again. having to use another bottom end casing from another knocking bottom end i had lying about now as it has f@cked the piston chamber

ukimpreza

iTrader: (9)

possibly injector fault when you say two you mean front cylinder passenger side?

zippy!

iTrader: (1)

cant remember which position its in its the pot with the number 2 stamped on the block above it mate

zippy!

iTrader: (1)

any other ideas anyone?

alcazar

iTrader: (2)

Depends on your spec: what bhp, what injectors, what induction kit, what exhaust, what turbo, who mapped it and when?

DT-SPD

iTrader: (7)

Sounds like detonation has lead to piston overheating and melting. Can be caused by many things but usually mapping is to blame.

786omar

iTrader: (5)

Detonation! Get your map checked for det by a mapper

stedee

iTrader: (4)

I think 2 is rear drivers side, isn't that the one that always go, some say running lean becau@e its last injectors to be fed, some say the extra heat from the turbo causes it.

stedee

iTrader: (4)

Above, a bit late isn't it

Maz

iTrader: (34)

I think it was advice to eliminate it happening with the new build.

alcazar

iTrader: (2)

Cylinder No3 is rear, driver's side.

786omar

iTrader: (5)

zippy!

iTrader: (1)

correct mate

zippy!

iTrader: (1)

as i say i bought the car with the knocking sound as saw potential in it and hate seeing them getting broken for spares all the time i am only second owner in uk and has genuine 62 thousand miles on it it is running vf34 turbo yellow 440 injectors 3" total de cat from turbo back front mount intercooler hks mushroom filter forge dump valve but no sign of a remap in the history i got with the car not sure what sort of power it would be pushing with these mods any ideas anyone

The Pink Ninja

iTrader: (23)

A bit less than it should be with 3 pistons

On a serious note id say around the 330 mark

zippy!

iTrader: (1)

id gathered that much